Entry 1 sense Webster, 1913 Rebutter /(rē̇*bŭt"tẽr)/ · Re·but·ter · IPA /ɹɪˈbʌtɚ/ 01 n. The answer of a defendant in matter of fact to a plaintiff's surrejoinder. 1. The answer of a defendant in matter of fact to a plaintiff's surrejoinder.(Law)